Single Arm Tricep Extension
Keep the upper arm beside the head and lower behind it rather than out to the side, then lock out without swinging. Working one arm at a time stops the stronger side carrying the weaker one, which is exactly what a two-handed version hides.
What it works
Triceps
How to do it
- 1Hold one dumbbell overhead with the upper arm vertical and beside your head.
- 2Lower the weight behind your head, not out to the side, keeping the upper arm still — only the elbow moves.
- 3Extend back to lockout without swinging or letting the shoulder drift forward.
- 4Working one arm at a time is deliberate: with two hands the stronger side quietly takes more of the load and you never find out, which is exactly how an imbalance survives months of training.
Cues that matter
- ›Upper arm still, beside your head
- ›Lower behind the head, not to the side
- ›Lock out without swinging
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